Developed by Compaq, Hewlett-Packard, Intel, Lucent, Microsoft, NEC and Phillips.
 USB A (at the Connector)
 USB A (at the Connector)
 USB B (at the Connector)
 USB B (at the Connector)
Series "A" plugs are used towards the host system and series "B" plugs are used towards the USB device.
| Pin | Name | Description | 
|---|---|---|
| 1 | VBUS | +5 VDC | 
| 2 | D- | Data - | 
| 3 | D+ | Data + | 
| 4 | GND | Ground | 
| Contributor: | Joakim Ögren, Tomas Ögren | 
| Source: | USB FAQ at USB Implementers Forum | 
| USB Specification v2.0 at USB Implementers Forum | 
  Copyright © The Hardware Book Team 1996-2004.
  May be copied and redistributed, partially or in whole, as appropriate.
  Document last modified: 2002-01-13